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A 20 kg object is moving with a velocity of 5 m/s. What is its kinetic energy? (
A 20 kg object is moving with a velocity of 5 m/s. What is its kinetic energy? (2021)
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A 20 kg object is moving with a velocity of 5 m/s. What is its kinetic energy? (2021)
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Kinetic energy KE = 0.5 * m * v² = 0.5 * 20 kg * (5 m/s)² = 0.5 * 20 * 25 = 250 J.
Questions & Step-by-step Solutions
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Q: A 20 kg object is moving with a velocity of 5 m/s. What is its kinetic energy? (2021)
Solution:
Kinetic energy KE = 0.5 * m * v² = 0.5 * 20 kg * (5 m/s)² = 0.5 * 20 * 25 = 250 J.
Steps: 9
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Step 1: Identify the mass of the object. The mass (m) is given as 20 kg.
Step 2: Identify the velocity of the object. The velocity (v) is given as 5 m/s.
Step 3: Write down the formula for kinetic energy (KE). The formula is KE = 0.5 * m * v².
Step 4: Substitute the mass into the formula. Replace m with 20 kg: KE = 0.5 * 20 kg * v².
Step 5: Substitute the velocity into the formula. Replace v with 5 m/s: KE = 0.5 * 20 kg * (5 m/s)².
Step 6: Calculate (5 m/s)². This equals 25 m²/s².
Step 7: Substitute 25 into the formula: KE = 0.5 * 20 kg * 25 m²/s².
Step 8: Multiply 0.5 by 20 kg. This equals 10 kg.
Step 9: Multiply 10 kg by 25 m²/s². This equals 250 kg·m²/s², which is 250 J.
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